Printing-plate clamping device



June 16, 1925.

. 1,542,315 E. F. NOELL PRINTING PLATE CLAMPING DEVICE Filed Jan. 26,1925 v AVVE/VTO/R 5r 1 j Z Patented June 16, 1925.

UNITED STATES PATENT OFFICE- ELMER F. NOELL, 0F CINCINNATI, OHIO,ASSIGNOR TO THE PRINTING MACHINERY COMPANY, OF CINCINNATI, OHIO, ACORPORATION OF OHIO. T

PRINTING-PLATE CLAMIING DEVICE.

Application filed January 26, 1925. Serial No. 4,743.

To-aZZ whom it may concern:

Be it known thatI, EIMER F. NoELL, a citizen of the United States, and aresident of Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Printing-PlateClamping Devices, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming partof this specification.

. My invention relates to devices for retaining printing plates inplace, by means of clamping jaws, adjustable in their mounting toimpinge against the plate and hold it in place. I

My invention is particularly designed for use in the familiar style ofprinting plate mounting element having a series of closely related roundholes, with expanded bases.

In the production of drop-in-hooks which is the term applied in the artto printing plate clamping and holding pieces of the type here inquestion, the problem has been to produce a device which has few parts,simply made, and simply operated. The devices are quite small, bein on asmaller scale than the drawings 1n this specification, which are atleast twice the size of the actual devices, and the manufacture andassembly, as well as the manipulation of these small devices requireclose work, which is expensive unless the structure is simple in theextreme.

In my structure I provide a device which has an integral jaw at one end,and a pivoted piece actuated by a screw, which rocks against the wall ofthe hole or groove, and thus at one act thrusts the jaw against theplate, and tilts a lower end on the pivoted piece under the shoulder ofthe expanded base of the hole. I thus take advantage of the tilting ofthe jaw mounting body, but the shoulder engaging member is not on thejaw mounting piece.

There are three pieces and a pivot pin, in my device, whic is obviouslya simple structure to make, and a stout one in use.

I accomplish my objects by that certain construction and arrangement ofparts to be hereinafter more spe'cifically pointed out and claimed. i l

I have merely indicated a base block 1,

in which are round holes 2, having expanded bases to form shoulder 3.The printing plate merely indicated at, 4 is set on top of the baseblock and is to be clamped in place by a series of the jaw members beingbrought into engagement with it, on all sides. t I

The pin- 5 is provided of a size suitable to easily slip into the holes2, which pin has secured integrally or otherwise, but preferablypermanently thereto, a cross head 6 serving as a jaw to engage the sideof a printing plate.

The lower end of the body of the pin is bifurcated and pivoted at 8 nearits lower end is an L-shaped piece havingthe arm 9 and the projection10.

The arm 9 is provided with a round bottomed groove 11, which is formedin the slanting top face 12 of the arm.

The interior of the pin is provided with a threaded hole, opening outthrough" the top ofthe jaw and pin as indicated at 13. In the lowerportion of this hole is placed a screw 14, which has a square socket inits upper end at 15 tobe engaged by a tool. The tool is shown as havinga head 16 and a square shank 17 to engage the screw when thrust throughthe hole at 13.

The device as so constructed, isadjusted with the screw upwardly in itshole, so that the L-shaped piece can be swung to a position with its-armembraced in the bifurcated legs of the pin. The projection of theL-shaped member will then pass down through the hole, and when the jawhas come into contact with the top of the plate, the lowerend of the pinand the projection 10 will lie below the shoulder in the base of thehole. 1

the wall of the hole in which the device placed, and will simultaneouslymove the jaw tightly against the plate, and tilt the whole body of thepin soihat: the'projection 10 is swung under the shoulder at the base ofthe hole. The rockingijof the L-sha'ped piece, alsoulif-ts up on theprojection and clalmps it firmly under the shoulder of the ho e; i

The pin body. will tilt so asto move the jaw across the hole as far asthe top of the pin will go, but if the plate crosses the holeintermediate its openin'gg-the clamping action against the undershoulder will take place in the same manner, as if the pin were moved toabutment with the wall at the upper mouth of the hole. v

I do not wish to beflimited to the exact f0l 11110f parts or mode ofoperating them, but wish to stat'e'the' invention inherent in thestructure described in the claims'that follow. I

Having thus described my invention, what I claimas new desire'to secureby Letters Patent, is I 1 A prii'iting plate clampdevi'ce, adapted foruse inaperturesin a'base'block' havf ing shoulders formed in the bottomof the apertures comprising a body" having a j aw thereon, a memberpivoted on the body, so as to swing into substantial ligmnenetherewitlitliereb'y permitting insertionof the entire device in theaperture, said member having a projection at the lower end thereof forengagement with the shoulder in the base of the aperture, and meansmovable through the body and engaging the the pive oted member to rockthe same into position of engagement with the wall of the hole, therebymoving the projection into position beneath said sl'i'oulder by'the'tilting" of the body.

H 2. A printing plate clamp device adapted for use in apertures in abase block having shoulders formed in the bottom of the aperturescomprising a body having a jaw thereon, a member pivotedon the body andhaw ing an El-shape, formed so that the upward portion of the E canswing into substantial alignment with the body thereby permittinginsertion of the entire device in the aperture, and the angle portion ofthe L formed to swing beneath the shoulder, when the member is rocked toforce the jaw against a plate, and means in the body for engaging:thesaid member. 7

3. A printing plate clamp device adapted for use inapertures inabase'block having shoulders formed-in the bottom of the aperturescomprisinga body having a jaw thereoh,--a member pivoted on the body andhaving an L-shape, formed so that the upward po'rtionof the'L can swinginto substantial alignment with the body thereby permitting vinsertionof the entire device in the aperture," and the angle portion of the Lformed to swing beneath the shoulder, when the member is rocked to forcethe jaw against a plate, and means in the body for engaging thesaidmember, said means com prising a" ser'ew, and a slanting portion atthe engagement oftlle screw with the member res'ultirig in"wedging itoutwardly into engagement withthe wall of the aperture. ELMER F. NOELL.

